Embossing-machine.



'No. 685,833. Patented Nov. 5, MI.

J. G. GRALL' EMBOSSING MACHINE.

(Application filed Dec. 27. 189B. Renewed. Apr. 8, 1901.)

(No Model.)

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UNITED STATES PATENT OFFICE.

JOSEPH G. GRALL, OF DETROIT, MICHIGAN, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE ROBERT MITCHELL MACHINERY COMPANY, A CORPO- RATION OF MICHIGAN.

EMBOSSlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 685,833, dated November 5, 1901.

Application filed December 2'7, 1898. Renewed April 8, 1901. Serial No. 54,929. (No model.)

To ctZZ whom it may concern: shown) being provided to prevent the guides Beitknown thatI, JOSEPH Gr. GRALL, aciti- F from rotating in their bearings. zen of the United States of America, residing II is a horizontal slot formed in the crossat Detroit, in the county of Wayne and State head, into which the crank-pin D engages. 55

5 of Michigan, have invented certain new and I is the embossingdie, detachably secured usefulImprovementsinEmbossing-Machines, by a mortise -andtenon connection to the of which the following is a specification, referlower end of the die-holderJ,having the shank ence being had therein to the accompanying J, the upper end of which is secured detachdrawings. ably by a set-screw K in a socketin the cross- 60 To My invention refers to that kind of embosshead.

ing upon leather and the like in which metal L is a locking-pin extending down through leaf is first pasted over the spot on which the the die-holder into a recess of the embossingembossing-dieis to operate and which requires die to lock the same in place, and M is a the die to be heated in order to prevent the wooden knob attached to the upperend of the 65 metal leaf from adhering to the die. locking-pin.

One object of my invention is to do away N is an electric heating-coil sleeved upon with the use of a heating-flame, which in the the lower end of the die-holder and resting on present construction of such machines is the shoulder 0 adjacent to the embossing-die. made use of to heat the die in the interval 0 O are the electric conductors connecting 70 between its operation and which has the disthe terminals of the coil with the source of advantage of smudging the die more or less, electricity. with the resultthatit soils the impress made P is a table supported upon a bed-plate Q,

by the die. slidingly secured between cheeks a of the Another object is to make a machine which frame. 75 requires little power and is simple and com- R is a yielding bed-plate set in a recess in pact in its construction and can be readily the table below the embossing-die. operated by a boy or girl, whereby it is espe- S designates springs yieldingly supporting cially adapted for factory use, as in the manthe bed-plate R upon the bed-plate Q. ufacture of shoes, where it is the custom to T designates adjusting-screws for regulat 8o stamp each shoe with the name or trade-mark ing the tension of the springs.

of the dealer or manufacturer. U is a bolt centrally projecting from the To this end my invention embodies the apunder side of the bed-plate Rthrough the bedplication of electricity as a means for heatplate Q and carrying an adjusting-nut V. ing the embossing-die and other features of YV is a burner secured upon the table P in 85 construction, all as more fully hereinafter dethe rear of the embossing-die and suitably scribed,and showniu the accompanying drawconnected with a source of supply.

ings, in which In practice the parts beingconstructed and Figure 1 is a side elevation of my machine, arranged as shown and described they are inwith the table and bed-plate in longitudinal tended to operate as follows: If suitable con- 90 section, substantially on line y y, Fig. 2. Fig. nection is made between the heating-coil and 2 is a cross-sectionon line 00 :10, Fig. l. the source of electricity, (which is done by A is the frame of the machine. means of a switch in asuitable place in prox- B is a drive-shaft journaled in horizontal imity with the machine,) the heat generated bearings in the frame. in the coil is transmitted to the die-holder 93 C is a crank-disk secured upon the driveand embossingdie and maintains the latter shaft. substantially at a uniform degree of heat as D is a crank-pin. best suited to the operation. Upon motion E is a cross-head provided with vertical being transmitted to the shaft B the crankguides F, engaging in vertical guide-bearings pin (by engaging into the slot of the cross- I00 G on the frame above and below the crosshead) impartsavertical reciprocating motion head, respectively, suitable guide-lugs (not to the cross-head and die connected thorowith. Supposing the machine to be used in the manufacture of shoes, the particular parts thereof upon which the mark is to be ELffiXGd are preferably prepared by an attendant operator, who places a suitably-sized piece of gold, silver, or aluminium leaf over the spot to be embossed, using a suitable size or paste to make it slightly adhere. The piece thus prepared is taken by the operator and placed under the embossing-die to make an impress and removed after the impress is made. The metal leaf not acted upon by the die is then brushed off, while the impress of the die re mains traced in gold or silver.

My invention requires but very little power and can be driven by a sewing-machine belt applied to the groove-pulley Y on the shaft B, and instead of operating the machine by continuous motion a suitable clutch C, controlled by a foot-lever, (not shown,) is used to stop and start the motion at the will of the operator.

To make my machine available, if the source of electricity should be wanting, I have arranged the table P to slide in longitudinal direction between the cheeks a the necessary distance so that when drawn out in front the burner WV can be placed below the die and heat the same by gas-flame in the interval of the work.

The heating-coil may be of any suitable construction and applied to the die in any manner to obtain the object of my invention. As shown in the drawings, the heating-coil is wound upon a porcelain tube 1), which slips over the die-holder, and the loss of heat by radiation is prevented by covering the coil on the outside with asbestos sheet. In this manner the heating-coil can be readily removed from the die-holder J after the latter is taken out from the socket in the crosshead.

By means of the adjustment provided by the screws T the bed-plate R can be made more or less yielding or raised and lowered by means of the adjusting-nut V. The manner of securing the embossing-die by means of the locking-pin J is also very simple and permits of replacing it with other interchangeable dies, a variety of-which is generally required with the present practice of marking the name of each dealer on the goods to be manufactured for him.

\Vhat I claim as my invention is-- 1. In an embossing-machine, the combination of the vertical reciprocating die-holder J, the die I detachably secured to said dieholder, and the electric heater N removably and adapted to move the auxiliary heater under the die.

3. In an embossing-machine, the combination with the supporting-frame and table supported thereon, of a drive-shaft secured in horizontal bearings of the frame longitudinally thereof, the crank secured to the front end of said shaft and having a crank-pin, the cross-head operating in vertical guides in the frame and provided with a horizontal slot into which the crank-pin engages, the die-holder vertically adjustably secured in a socket formed in the cross-head, the die removably secured to the die-h0lder and the electric heater sleeved on the shank of the die-holder and carried thereby.

4. In an embossing-machine, the combination with the supporting-frame, the verticallyreciprocating cross-head in said frame, the vertical die-holder detachably secured in a socket in said cross-head, the die having a mortise-and-teuonengagement with the dieholder and a locking-pin passing through the cross-head and die-holder and engaging into a recess in the die.

5. In an embossing-machine, the combination with a vertical reciprocating cross-head, the die-holder J, having the shank J, adjustably supported in the socket formed in the cross-head, and the electric heating-coil sleeved on the lower end of the shank and resting on the shoulder cformed on the head of the (lieholder and in heating contact therewith.

6. In an embossing-machine, the combination with a vertical reciprocating cross-head, the die-holder having a shank and a heatingcoil sleeved thereon, said shank forming a core for the heating-coil and having a portion projecting above the coil and supported in a socket formed in the cross-head.

7. In an embossing-machine, the combination with a reciprocating cross-head carrying the die, of a die-holder having a shank secured in a socket in the cross-head and having a head at its lower end to which the die is secured,and an electric heating-coil sleeved on the shank of the die-holder in heating contact with the die-holder.

8. In an embossing-machine the combination with a reciprocating cross-head carrying the die, of a die-holder having a shank secured in a socket in the cross-head and having a head at its lower end to which the die is secured, an electric heating-coil sleeved on the shank of the die in heating contact with the die-holder to indirectly heat the die, and a reciprocating table carrying an auxiliary source of heat adapted to apply the heat directly to the die.

In testimony whereof I affix my signature in presence of two witnesses.

JOSEPH Gr. GRALL.

Witnesses:

OTTO F. BARTIIEL, ADOLPH BARTHEL. 

